But the document does praise reform of the Common Fisheries Policy, work on ash dieback and international work to protect elephants, rhinos and whales.

The report rates four of the government's commitments to the natural environment as green - meaning good progress - with 12 amber (moderate progress) and nine red (failing). Of the commitments rated in a similar report a year ago, 20% have got worse and 10% have improved, it says.

The report urges the government to implement the Common Agricultural Policy so that it delivers as much as possible for wildlife and the countryside.

'Message is clear'

"David Cameron promised the greenest government ever. Using the government's own promises as a yardstick, today's findings show he's failed to stick to his plan," said Wildlife and Countryside Link's director, Dr Elaine King.

Alongside the report, the 41 organisations published a ComRes survey of more than 2,000 adults, which they say suggests public support for action on nature, wildlife and the countryside.

Some 83% of British adults believe the natural environment should be protected at all costs, the survey suggests, but a quarter think the government is doing enough to protect landscapes and wildlife.

"The message from the public is clear - they want healthy seas and landscapes providing rich habitats for thriving wildlife," said Dr King.

Commenting on the report, a spokesman for the Department for Environment, Food and Rural Affairs (Defra) said: "While this report acknowledges some of our achievements to date, many of the criticisms are unjustified and based on opinion, not facts.

"Our ambitions are long term and we are making good progress."

The organisations behind the report also include WWF, the CPRE and the RSPCA.